Contact clamp



May 15 1928. t 1,670,009

, P. A. SAWYER CONTACT CLAMP Filed April 9, 1925 fiwz /P r7. cF/WM ZP,

A it jrei t Patented May 15, 1928.

3311,12 a. 'SAWYERf or HASBROUCK HEIGHTS, NEW JnnsEY.

.ooN'rAc'r CLAMP.

Application and April afiaasr seri ino. 21, 351.

igure,liis,a-sideelevation of my invenen i u t a ed i pe o upo a Pip (t ipine.-.. lhenn i x et 'd li s) 1 ,glii-gure 2 pis a central {longitudinal section take n on the line,2 -2of Figure 1;

rdlfigure-ii' isatopplan view-thereof and gli iguretdsa detailg perspective view of the .operatiiiglever ofmy improved deviceillusit atinsan t-her"form i- ;e sonnection f ;-My invention, in the form or' embodiment shown infthe drawing and briefly described,

nWmP S-iS azre atirelyd h emet l i b d r strip, 10, which is adaptedto surround a pipe or similar conduit, 11, a saddle membe L 2, n a opera n lever,

The saddle, 12, is preferably constructed of a pair of substantially semi-circular plates, 14, which are joined or connected together by means of a pair of upper and lower tross members, 15 and 16. The inner .surfades of the cross members, 15 and 16, are preferably slightly hollowed or curved so that they may readily conform to the curveture of the pipe when seated. As is clearly illustrated in Figure 2 of the accompanying drawing, the cross member, 16, is firmly seated against the pipe or conduit, 11, whereas the cross member, 15, rests against and firmly locks the backwardly bent or extreme end, 17 of the relatively thin metallic strip, 10, which, in turn, firmly bears against the pipe or conduit, 11. p l

The opposite or free end, 18, of the metallic strip, 10, is provided with a plurality of equi-distantly spacedelonga'ted openings, 19, which are adapted to be engaged by the teeth of a seg'ment, 20. Again referring to Figure 2, it will be noted that only a portion of theteeth of the segment, 20, are" con-. 'cent iri'cewith the trun'nions, 21, the upper.

being set further away from the centerin thesubstantialfiorm'of a cam.

T'Formed] integrally with the Seginent ZO,

is the operating lever, l3, wh ich not only serves the purpose of a means for actuating ithe segment for lockingor unclamping the relat vely thin strip jvitli/respect to. the condu t,- bu t it may also provldea means ':'for securing the ,w iref 2 2, for example',uas" is illustrated in Figures'8 and4. A relatively narrow-slot, 23, .which slightly enlarged at its 'entremefend is formed in the free end of the operatln be hereinafter described.

the greater portion of the'conduit', 511, and

The in tallie str'p', 10, passing oyerfibo'th 7 0 3 lever 13, "for to j offjthe cross members, 15 and 16, surrounding ,be ing again forced against [the "members, 15 Y 'an d lfi," by reason of -the teetli of the segment,

.20, it will he readily seen, o fi erslaii eiicellent and perfect electrical connection between the 1 pipe ,or conduit, [11, and ,the segment, 120,,

The ent1'eine .ends io flth e teeth of thefseginept, 20,.by reason of the fact tliatthey pass through the openings, 19, of tl e=stiip,.10,and

frictionally bear against the relatively :aatio nary portion-of the strip, "10', be

clearly see ngp resent "a wiping or scr'aping I contact. 3 additional novelffeature of this 1 construction s thatthese teeth vbeing arrange d finfacam like construction increasingly be ar against the lower or relatii 'elyhtationary portion of the strip 10.

I have illustrated several different man v ners of electrical connection between the Wire, 22. and thesegment, 20; 1n Figures 1 v and 2 the extreme end of the wire, 22, shown looped through a pair of the spaces between the teeth of the segment, 20, it being clearly seen the effectiveness with which this wire would be wedged between the teeth of the segment, 20, and the adjacent portion ofthe metallic strip, 10.

The electrical connectionillustrated in Figure 3 is eifected'by means of a. screw, .25,

whichis adapted to pass through the open I 7 ing, 26, formed near the free end of the operating arm, 13, and is held initslocked position by means of a suitable nut, 27.

7 Still another form of electrical connection is illustrated in Figure 1 in which instance I slip the wire into" the relatively narrow its slot, 23, at a point beyond the opening, 26, F

then pass, the extreme and of the wire through this opening, 26, from which point it may be coiled around the arm as many times as desired, which will firmly lock the wire in position; N p

By reason of the fact that the trunnions,

21, are provided with slightly reduced ends 7 dotted lines in Figurei, and then press them together into their proper position. By inserting a hooked memberthrough the opening, 26, near the extreme end of the operating lever, 13, it will be readily seen,

a great deal of additional pressure may be I v 'duit and an eccentrically 'iormed segment having a pa1rofoppos1tely; disposed trunplaced against the teeth of the segment, 20. I have found this to be very desirable in connection'with large pipes or conduits.

I claim: I

1. A clamp forconduits or the like, comv prising a saddle member having a pair of side plates and cross members, a metallic strip being backwardly bent around one of saidcross members and adapted to pass around the conduit and an eccentric member being pivotally mounted between said side plates of the saddle member and having an arm provided with a relatively narrow slot adapted to receive a wire'in the free end thereof.

v 2. A clamp for conduits or the like, 'c0m prising a saddle member having a pair of side plates'and cross members, a metallic strip being backwardly bentaround and secured to one of said cross members and provided along its free end with a plurality of equi-distantly spaced slots, said strip'being adapted'to pass around the conduit and an eocentricallyformed segment adapted to engage the saldslots in the relatively thin strip for actuating said stripin tightening versely extending crossmembers, having rounded outer surfaces, a relatively [thin metallic strip being backwardly bent-around one otsaidcross members and arranged tobe impinged between the cross-member and said conduit and'provi'ded along its free end with a plurality of equi-distantly spaced slots, said strip adapted to encircle the con nions adapted to engage within said alignplates. i

4. A clamp for conduits or the like, comprising a saddle member having a pair oii outwardly extending side plates having aligning openlngs therein, a pair of transversely extending cross members, having rounded outersurfaces, a relatively, thin metallic strip being backwardlybent around adapted one of said cross members to bear against the c'onduitand provided along its free end witha plurality 0f equidistantly spaced slots, said strip" being adapted to encircle the conduit and an 'ecopenings in the outwardly di osed centrieally formedsegment having a pairof oppositely disposed trunnionsadapted to in the free end thereof.

PH'ILI? AQ SAWYER. 

